Results 31 to 40 of about 3,492 (201)

Obligate autotrophy at the thermodynamic limit of life in a new acetogenic bacterium

Frontiers in Microbiology, 2023
One of the important current issues of bioenergetics is the establishment of the thermodynamic limits of life. There is still no final understanding of what is the minimum value of the energy yield of a reaction that is sufficient to be used by an ...
Evgenii N. Frolov, Alexander G. Elcheninov, Alexandra V. Gololobova, Stepan V. Toshchakov, Andrei A. Novikov, Alexander V. Lebedinsky, Ilya V. Kublanov   +6 more
doaj   +1 more source

A Third Way of Energy Conservation in Acetogenic Bacteria

Microbiology Spectrum, 2022
Acetogenic bacteria are a group of strictly anaerobic bacteria that make a living from acetate formation from two molecules of CO2 via the Wood-Ljungdahl pathway (WLP).
Florian Kremp, Jennifer Roth, Volker Müller   +2 more
doaj   +1 more source

Anaerobic digestion of donkey dung for biogas production

South African Journal of Science, 2016
Biogas can provide a solution to some of South Africa’s energy needs, especially in rural areas of Eastern Cape Province that have plentiful biogas substrates from donkeys, goats, sheep, cattle and chicken.
Patrick Mukumba, Golden Makaka, Sampson Mamphweli   +2 more
doaj   +1 more source

Extracellular Electron Uptake by Acetogenic Bacteria: Does H2 Consumption Favor the H2 Evolution Reaction on a Cathode or Metallic Iron?

Frontiers in Microbiology, 2020
Some acetogenic bacteria are capable of using solid electron donors, such as a cathode or metallic iron [Fe(0)]. Acetogens using a cathode as electron donor are of interest for novel applications such as microbial electrosynthesis, while microorganisms ...
Jo Philips
doaj   +1 more source

The root zone of graminoids: A niche for H2-consuming acetogens in a minerotrophic peatland

Frontiers in Microbiology, 2022
The importance of acetogens for H2 turnover and overall anaerobic degradation in peatlands remains elusive. In the well-studied minerotrophic peatland fen Schlöppnerbrunnen, H2-consuming acetogens are conceptualized to be largely outcompeted by iron ...
Anja B. Meier, Sindy Oppermann, Harold L. Drake, Oliver Schmidt, Oliver Schmidt   +4 more
doaj   +1 more source

Alamethicin Suppresses Methanogenesis and Promotes Acetogenesis in Bioelectrochemical Systems [PDF]

Applied and Environmental Microbiology, 2015
ABSTRACT Microbial electrosynthesis (MES) systems with mixed cultures often generate a variety of gaseous and soluble chemicals. Methane is the primary end product in mixed-culture MES because it is the thermodynamically most favorable reduction product of CO 2 .
Zhu, Xiuping, Siegert, Michael, Yates, Matthew D., Logan, Bruce E.   +3 more
openaire   +3 more sources

Microbial Degradation of Cellulosic Material and Gas Generation: Implications for the Management of Low- and Intermediate-Level Radioactive Waste

Frontiers in Microbiology, 2019
Deep geologic repositories (DGR) in Canada are designed to contain and isolate low- and intermediate-level radioactive waste. Microbial degradation of the waste potentially produces methane, carbon dioxide and hydrogen gas.
Danielle Beaton, Danielle Beaton, Phillip Pelletier, Richard R. Goulet, Richard R. Goulet   +4 more
doaj   +1 more source

Is reduced ferredoxin the physiological electron donor for MetVF-type methylenetetrahydrofolate reductases in acetogenesis? A hypothesis

, 2021
The methylene-tetrahydrofolate reductase (MTHFR) is a key enzyme in acetogenic CO2 fixation. The MetVF-type enzyme has been purified from four different species and the physiological electron donor was hypothesized to be reduced ferredoxin.
Kremp, Florian, Öppinger, Christian Manfred, Müller, Volker   +2 more
core   +1 more source

“Candidatus Galacturonibacter soehngenii” Shows Acetogenic Catabolism of Galacturonic Acid but Lacks a Canonical Carbon Monoxide Dehydrogenase/Acetyl-CoA Synthase Complex

Frontiers in Microbiology, 2020
Acetogens have the ability to fixate carbon during fermentation by employing the Wood-Ljungdahl pathway (WLP), which is highly conserved across Bacteria and Archaea.
Laura C. Valk, Martijn Diender, Gerben R. Stouten, Jette F. Petersen, Per H. Nielsen, Morten S. Dueholm, Jack T. Pronk, Mark C. M. van Loosdrecht   +7 more
doaj   +1 more source

Enzymology of the Wood–Ljungdahl Pathway of Acetogenesis [PDF]

Annals of the New York Academy of Sciences, 2008
The biochemistry of acetogenesis is reviewed. The microbes that catalyze the reactions that are central to acetogenesis are described and the focus is on the enzymology of the process. These microbes play a key role in the global carbon cycle, producing over 10 trillion kilograms of acetic acid annually.
openaire   +3 more sources